The revenue R (in millions of dollars) for a company from 1999 to 2005 can be modeled by the equation below, where t is the year, with t = 9 corresponding to 1999. R = 0.59221t4 - 18.0042t3 + 175.293t2 - 316.42t - 116.5 Polo Ralph Lauren Revenue R 4000 3500 3000 Revenue (in millions of dollars) 2500 2000 1500 10 11 12 13 14 15 Year (9 ( 1999) Ci (a) Find the slope of the graph for the year 2002. (Round your answer to two decimal places.) X Find the slope of the graph for the year 2004. (Round your answer to two decimal places.) X